![]() The thrusting intensity in the final phase of ascent was greater for dives in which ascent exhalation began at a greater depth, suggesting an energetic cost to this behaviour, probably as a result of loss of buoyancy from reduced lung volume. Comparison of air release between dives, together with lack of variation in intensity of thrusting movement during initial descent regardless of ultimate: dive depth, suggested that inhaled diving lung volume was constant for all dives. ![]() Bubble sound intensity recorded from one seal followed predictions of a simple model based on venting expanding lung air with decreasing pressure. ![]() The depth of initial bubble emission was best predicted by maximum dive depth, suggesting an underlying physical mechanism. Abstract = "Novel observations collected from video, acoustic and conductivity sensors showed that Antarctic fur seals consistently exhale during the last 50-85% of ascent from all dives (10-160m, n > 8000 dives from 50 seals). ![]()
0 Comments
Leave a Reply. |